I would think that the idle would affect it IF it is controlled by the APPS (manual hi idle whereas the high idle is possible by physical pressure on the APPS). If it is electronically controlled, then I don't think so.
My truck does run smoother since I did it....

idle speed
 

So what does y'alls truck idle at normally

The 5 spd does have a different idle spped than the auto I think.
My auto idles at 820-830.

I with ya Marine I was thinking it would be electronically controlled but, like I said not sure:humm: I pulled my work trailer today with the torque tune and wow what a difference. I can turn it clear up and actually drive it. Before I was able to use setting #3 half way decent but now its run what ya want:choochoo: Turbo does seem to spool a lot faster but why? I mean I can spool this in a hurry empty but not usually pulling my trailer:humm:

My auto Idles right at 800rpm :U:

ok thanks fellas I am doing this tomorrow it is storming like crazy and I got my mud bogger burried up to the frame lol got a tractor coming to tow it out. Can't wait to do this

20-35 minute job :U:

my 5spd idles bout 700-750 or so

Let us know how much it was out.

Where is the PICs?!?!

I noticed that my throttle has a little more response and my cruising EGT's are down a bit. I still get some surge when running the TQ Tune and I lug the truck.